I don't know the details of Mozilla's finances, but they should be treating their current income as a windfall, not as a reliable future income stream. i.e. the

I don't know the details of Mozilla's finances, but they should be treating their current income as a windfall, not as a reliable future income stream. i.e. their expenses should be significantly less than their revenue, and they should invest the balance, and attempt to create a trust which is capable of financing itself in perpetuity, in the same way as medical research charities like the Wellcome Trust.